Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1977__83_177803, author = {Paul Erd\"os and Ian Richards}, title = {Density {Functions} for {Prime} and {Relatively} {Prime} {Numbers.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {99--112}, publisher = {mathdoc}, volume = {83}, year = {1977}, zbl = {0355.10034}, url = {http://geodesic.mathdoc.fr/item/MOMA_1977__83_177803/} }
Paul Erdös; Ian Richards. Density Functions for Prime and Relatively Prime Numbers.. Monatshefte für Mathematik, Tome 83 (1977), pp. 99-112. http://geodesic.mathdoc.fr/item/MOMA_1977__83_177803/